Merge: igb: Driver Update

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/7007

  12906ba igbvf: Remove two unused declarations
  f40b0ac igb: Fix 2 typos in comments in igb_main.c
  4d26b6e igbvf: remove unused spinlock
  f70b864 igb: Remove static qualifiers
  6dc75fc igb: Introduce igb_xdp_is_enabled()
  80f6ccf igb: Introduce XSK data structures and helpers
  0fe7cce igb: Add XDP finalize and stats update functions
  2c61960 igb: Add AF_XDP zero-copy Rx support
  f8e284a igb: Add AF_XDP zero-copy Tx support
  8ae9466 igb: Fix passing 0 to ERR_PTR in igb_run_xdp()
  5eada2a igb: reject invalid external timestamp requests for 82580-based HW
  8fa7292 treewide: Switch/rename to timer_delete[_sync]()
  6fc54c4 igb: Link IRQs to NAPI instances
  b75a1de igb: Link queues to NAPI instances
  fc0fb1f igb: Add support for persistent NAPI config
  a22ed15 igb: Get rid of spurious interrupts

Late addition 2025-07-28:

  3b7c13d igb: xsk: solve negative overflow of nb_pkts in zerocopy mode

JIRA: https://issues.redhat.com/browse/RHEL-83574
Signed-off-by: Corinna Vinschen <[email protected]>

Approved-by: Michal Schmidt <[email protected]>
Approved-by: José Ignacio Tornos Martínez <[email protected]>
Approved-by: CKI KWF Bot <[email protected]>

Merged-by: Augusto Caringi <[email protected]>

Author: caringi

drivers/net/ethernet/intel/igb/Makefile

@@ -8,4 +8,4 @@ obj-$(CONFIG_IGB) += igb.o
 
 igb-y := igb_main.o igb_ethtool.o e1000_82575.o \
 	 e1000_mac.o e1000_nvm.o e1000_phy.o e1000_mbx.o \
-	 e1000_i210.o igb_ptp.o igb_hwmon.o
+	 e1000_i210.o igb_ptp.o igb_hwmon.o igb_xsk.o

drivers/net/ethernet/intel/igb/igb.h

@@ -18,8 +18,10 @@
 #include <linux/i2c-algo-bit.h>
 #include <linux/pci.h>
 #include <linux/mdio.h>
+#include <linux/lockdep.h>
 
 #include <net/xdp.h>
+#include <net/xdp_sock_drv.h>
 
 struct igb_adapter;
 
@@ -86,6 +88,7 @@ struct igb_adapter;
 #define IGB_XDP_CONSUMED	BIT(0)
 #define IGB_XDP_TX		BIT(1)
 #define IGB_XDP_REDIR		BIT(2)
+#define IGB_XDP_EXIT		BIT(3)
 
 struct vf_data_storage {
 	unsigned char vf_mac_addresses[ETH_ALEN];
@@ -255,6 +258,7 @@ enum igb_tx_flags {
 enum igb_tx_buf_type {
 	IGB_TYPE_SKB = 0,
 	IGB_TYPE_XDP,
+	IGB_TYPE_XSK
 };
 
 /* wrapper around a pointer to a socket buffer,
@@ -320,6 +324,7 @@ struct igb_ring {
 	union {				/* array of buffer info structs */
 		struct igb_tx_buffer *tx_buffer_info;
 		struct igb_rx_buffer *rx_buffer_info;
+		struct xdp_buff **rx_buffer_info_zc;
 	};
 	void *desc;			/* descriptor ring memory */
 	unsigned long flags;		/* ring specific flags */
@@ -357,6 +362,7 @@ struct igb_ring {
 		};
 	};
 	struct xdp_rxq_info xdp_rxq;
+	struct xsk_buff_pool *xsk_pool;
 } ____cacheline_internodealigned_in_smp;
 
 struct igb_q_vector {
@@ -384,7 +390,9 @@ enum e1000_ring_flags_t {
 	IGB_RING_FLAG_RX_SCTP_CSUM,
 	IGB_RING_FLAG_RX_LB_VLAN_BSWAP,
 	IGB_RING_FLAG_TX_CTX_IDX,
-	IGB_RING_FLAG_TX_DETECT_HANG
+	IGB_RING_FLAG_TX_DETECT_HANG,
+	IGB_RING_FLAG_TX_DISABLED,
+	IGB_RING_FLAG_RX_ALLOC_FAILED,
 };
 
 #define ring_uses_large_buffer(ring) \
@@ -715,6 +723,8 @@ enum igb_boards {
 
 extern char igb_driver_name[];
 
+void igb_set_queue_napi(struct igb_adapter *adapter, int q_idx,
+			struct napi_struct *napi);
 int igb_xmit_xdp_ring(struct igb_adapter *adapter,
 		      struct igb_ring *ring,
 		      struct xdp_frame *xdpf);
@@ -731,12 +741,21 @@ int igb_setup_tx_resources(struct igb_ring *);
 int igb_setup_rx_resources(struct igb_ring *);
 void igb_free_tx_resources(struct igb_ring *);
 void igb_free_rx_resources(struct igb_ring *);
+void igb_clean_tx_ring(struct igb_ring *tx_ring);
+void igb_clean_rx_ring(struct igb_ring *rx_ring);
 void igb_configure_tx_ring(struct igb_adapter *, struct igb_ring *);
 void igb_configure_rx_ring(struct igb_adapter *, struct igb_ring *);
+void igb_finalize_xdp(struct igb_adapter *adapter, unsigned int status);
+void igb_update_rx_stats(struct igb_q_vector *q_vector, unsigned int packets,
+			 unsigned int bytes);
 void igb_setup_tctl(struct igb_adapter *);
 void igb_setup_rctl(struct igb_adapter *);
 void igb_setup_srrctl(struct igb_adapter *, struct igb_ring *);
 netdev_tx_t igb_xmit_frame_ring(struct sk_buff *, struct igb_ring *);
+int igb_xdp_xmit_back(struct igb_adapter *adapter, struct xdp_buff *xdp);
+void igb_process_skb_fields(struct igb_ring *rx_ring,
+			    union e1000_adv_rx_desc *rx_desc,
+			    struct sk_buff *skb);
 void igb_alloc_rx_buffers(struct igb_ring *, u16);
 void igb_update_stats(struct igb_adapter *);
 bool igb_has_link(struct igb_adapter *adapter);
@@ -797,6 +816,33 @@ static inline struct netdev_queue *txring_txq(const struct igb_ring *tx_ring)
 	return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index);
 }
 
+/* This function assumes __netif_tx_lock is held by the caller. */
+static inline void igb_xdp_ring_update_tail(struct igb_ring *ring)
+{
+	lockdep_assert_held(&txring_txq(ring)->_xmit_lock);
+
+	/* Force memory writes to complete before letting h/w know there
+	 * are new descriptors to fetch.
+	 */
+	wmb();
+	writel(ring->next_to_use, ring->tail);
+}
+
+static inline struct igb_ring *igb_xdp_tx_queue_mapping(struct igb_adapter *adapter)
+{
+	unsigned int r_idx = smp_processor_id();
+
+	if (r_idx >= adapter->num_tx_queues)
+		r_idx = r_idx % adapter->num_tx_queues;
+
+	return adapter->tx_ring[r_idx];
+}
+
+static inline bool igb_xdp_is_enabled(struct igb_adapter *adapter)
+{
+	return !!READ_ONCE(adapter->xdp_prog);
+}
+
 int igb_add_filter(struct igb_adapter *adapter,
 		   struct igb_nfc_filter *input);
 int igb_erase_filter(struct igb_adapter *adapter,
@@ -807,4 +853,17 @@ int igb_add_mac_steering_filter(struct igb_adapter *adapter,
 int igb_del_mac_steering_filter(struct igb_adapter *adapter,
 				const u8 *addr, u8 queue, u8 flags);
 
+struct xsk_buff_pool *igb_xsk_pool(struct igb_adapter *adapter,
+				   struct igb_ring *ring);
+int igb_xsk_pool_setup(struct igb_adapter *adapter,
+		       struct xsk_buff_pool *pool,
+		       u16 qid);
+bool igb_alloc_rx_buffers_zc(struct igb_ring *rx_ring,
+			     struct xsk_buff_pool *xsk_pool, u16 count);
+void igb_clean_rx_ring_zc(struct igb_ring *rx_ring);
+int igb_clean_rx_irq_zc(struct igb_q_vector *q_vector,
+			struct xsk_buff_pool *xsk_pool, const int budget);
+bool igb_xmit_zc(struct igb_ring *tx_ring, struct xsk_buff_pool *xsk_pool);
+int igb_xsk_wakeup(struct net_device *dev, u32 qid, u32 flags);
+
 #endif /* _IGB_H_ */